I need pads; rotors; and calipers for my 2006 Ford, E350, dual-wheel, 6 litre diesel, ex-ambulance.I haven't checked the brakes on the duals, but I may need parts there, too. I also need a left, lower ball joint and steering dampener. I'm hoping for parts I can afford out of my low pension.

2018/03Mar/31Sat/16:40h. I don't see how to reply to my replies.
I have to go to the library for internet, it closes now, and is closed tomorrow,

Brake on those things are not cheap, especially if you want to do the entire job (if necessary) right.
Don't know how long you owned it, but from my experience driving an ambulance was hurry up and stop as ASAP. It wore the brakes out pretty quick. The rears can involve replacing th parking brake cables also which almost always froze up due to corrosion.
Suggest shopping around and getting as much info as possible to get the best price for decent parts. Doubt you will wear them out that quick with normal driving.

Were the rotors checked to see it they could be machined? Staying within minimum thickness.
Caliper rebuild kits, and pads are generally much cheaper than buying loaded reman calipers.
Lower joint and dampener I’d source through Ford online, usually a much deeper discount than walking in...